fix non-ASCII filnemae garbled on Internet Explorer

[djmonta]

Issue

Filename include any non-ASCII characters corrupt on Internet Explorer.

Description

• Set header Content-Dispoistion based on RFC 6266 (RFC 2231/RFC 5987) specification.
• Use rawurlencode to convert the filename.

[mikehaertl]

Thanks, this makes sense.

I just want to make sure that older browsers are still supported. Some suggest to add both filename= and filename*=utf-8 as mentioned in the example section of that RFC:

This example is the same as the one above, but adding the "filename" parameter for compatibility with user agents not implementing RFC 5987:

 Content-Disposition: attachment;
                      filename="EURO rates";
                      filename*=utf-8''%e2%82%ac%20rates

Everything should still be in 1 line, though.

Both parameters are also listed here:

The parameters "filename" and "filename*" differ only in that "filename*" uses the encoding defined in RFC 5987. When both "filename" and "filename*" are present in a single header field value, "filename*" is preferred over "filename" when both are understood.

What do you think?

[djmonta]

Thank you for suggestion.
I fixed the code leaving filename parameter as you wrote, supporting older browsers.

[mikehaertl]

Great, thanks. Just released 1.1.2 containing this fix.